B5 Quattro 2.8 "Shake"

[njjack2]

Hey guys, first post. found your forum from another forum.

So, the question I've had for a year and a half and about $2000.00 dollars now is:

1. What would cause a shake at 55mph in the seat ( Not steering wheel )?
To me that would mean it's coming from the rear, right?

Items replaced/checked...
1. 3 sets of wheels road force balanced
2. 2 wheel bearings
3. All four axles
4. Rebuilt transfer case
5. 2 tie rod ends
6. 2 alignments
7. 2 front brake calipers ( not related )
8. checked rear diff mounts
9. all fluids changed

BTW: I know of two other A4's locally with the same issue, one is a 2.8 and the other is a 1.8T

Thanks for your help.

[karmad]

I'd say rear mounts and/or tranny mounts

[Militant-Grunt]

You sure its not a bent wheel?

[njjack2]

I'd say rear mounts and/or tranny mounts

I haven't checked the trans mounts but I will this weekend. Thanks

[njjack2]

You sure its not a bent wheel?

Yeah, I've put three sets of brand new wheels on it and still does it. Thanks for the thought though.

[oldblu]

The road perhaps??

[somebody5788]

You said 3 sets of wheels. Do you mean the rims or the tires? A bad tire could easily cause this or a bent rim or just poor balancing. Mine shakes at around 75-80mph but its because my rear rims are not balance properly did the fronts right and half the shake is gone.

[ahaters46]

maybe your seats messed up

[njjack2]

You said 3 sets of wheels. Do you mean the rims or the tires? A bad tire could easily cause this or a bent rim or just poor balancing. Mine shakes at around 75-80mph but its because my rear rims are not balance properly did the fronts right and half the shake is gone.

Yeah, three sets of wheels and tires. Stock wheels and two sets of aftermarket wheels with nitto tires. Thanks

[njjack2]

The road perhaps??

I could blame it on that if I was still in Jersey, but down here in Florida the roads are a bit better! lol

[somebody5788]

What about CV's or axles? Drive shaft?

[njjack2]

What about CV's or axles? Drive shaft?

I have replaced all four axles, but have not messed with driveshaft other than rebuilding the transfer case. One thought could be that the indexing of the driveshaft could be wrong. I was hoping it wouldn't be that because it's a major pain in the......you get the idea.

[oldblu]

then how come the other cars have the same problem? might not be the car

[audiness]

probably the transmission if you['ve already tried all that stuff.